Lots of parents, who themselves didn't used to go to church, will find a "church home" once the kids are born. It is a good way to make contact with other parents in a similar situation. The rituals - the greeting, the sermon, singing, praying, the doxology, taking the collection, listening to the choir, filing in and out of the "nave" (where the people sit to hear the sermon), taking communion, the benediction, etc are all comforting and familiar rituals. Participating in them reinforces social bonds and help the members recommit to their shared world-view. It makes people feel good to participate, and to be with other people who feel the same way.
As to whether this involves a particular view of exactly what the god that is being worshiped is actually like will depend on the individual. This particular "conception of god" is mostly about the social bonds that come with being a member of the "church family". For the most part, members of a church congregation don't try to dissect their belief and think critically about it. They don't analyze it the way they might study a problem at work, where they may, in fact, bring extremely sharp and and focused analytical skills to bear. Their Christianity is a part of their lives where they are allowed to shed that part of their personalities and immerse themselves in something that feels bigger and more expansive than their own small being.
The entire group believes, it feels right to believe, and believing is the key to joining with them and being a member of the in-group. Not believing (or believing the "wrong" way) puts one in the out-group. The actual existential status of the god they worship is not at issue. It is not a question of factual accuracy, and the bible is not picked over as a collection of truth claims that must be evaluated. The goal is the overall experience of membership and belonging, of being part of something that at best will give you eternal life, and at worst will at least make you a better person.
There is another type of generic Christian that might fall into the "spiritual but not religious" camp. They want to do something for their souls, but aren't sure exactly what. Church seems to be what most people do, and so they choose that obvious route. They may have a friend who told them about a church or even invited them to go as guests. Before long, they are regular attendees, going for some vague reason (like, they feel like they probably should be going to church). When asked if they believe it all, they might respond, "well you never know, anything is possible..." and leave it at that. They might not participate in the community, stick around for the refreshments, or really even enjoy or treasure the experience, but continue going because it seems like the right thing to do. They have chosen the easy route to conventional spirituality, the main road available to middle class America. It didn't involve much decision making or self-reflection, and so they keep going. Who knows, maybe the church has rock music and a fun preacher who can relate current events to bible verses...
Poison for the generic Christian is critical study of the bible and its claims. Bible study is one thing, but people who begin down the path of questioning and doubt, of looking behind the curtain, of investigating the dead ends, inconsistencies, and errors found in the bible are on the road to separation from the group, agnosticism, and/or atheism.